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Move WasmModule initialisation into WasmBackend

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It helps to coordinate different sections with related values,
based on knowledge of Roc rather than Wasm.
This commit is contained in:
Brian Carroll 2021-11-04 20:41:23 +00:00
parent 1b91fd9533
commit 414c9e6f86
3 changed files with 58 additions and 49 deletions
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27
compiler/gen_wasm/src/wasm_module/sections.rs
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@ -351,6 +351,7 @@ impl Serialize for ConstExpr {
buffer.encode_f64(*x);
}
}
buffer.append_u8(opcodes::END);
}
}
@ -365,7 +366,6 @@ impl Serialize for Global {
fn serialize<T: SerialBuffer>(&self, buffer: &mut T) {
self.ty.serialize(buffer);
self.init.serialize(buffer);
buffer.append_u8(opcodes::END);
}
}
@ -482,8 +482,8 @@ pub enum DataMode {
}
pub struct DataSegment<'a> {
mode: DataMode,
init: Vec<'a, u8>,
pub mode: DataMode,
pub init: Vec<'a, u8>,
}
impl Serialize for DataSegment<'_> {
@ -503,7 +503,7 @@ impl Serialize for DataSegment<'_> {
}
pub struct DataSection<'a> {
segments: Vec<'a, DataSegment<'a>>,
pub segments: Vec<'a, DataSegment<'a>>,
}
impl<'a> DataSection<'a> {
@ -557,25 +557,6 @@ pub struct WasmModule<'a> {
impl<'a> WasmModule<'a> {
pub const WASM_VERSION: u32 = 1;
pub fn new(arena: &'a Bump) -> Self {
WasmModule {
types: TypeSection::new(arena),
import: ImportSection::new(arena),
function: FunctionSection::new(arena),
table: (), // Unused in Roc (mainly for function pointers)
memory: MemorySection::new(1024 * 1024),
global: GlobalSection::new(arena),
export: ExportSection::new(arena),
start: (), // Entry function. In Roc this would be part of the platform.
element: (), // Unused in Roc (related to table section)
code: CodeSection::new(arena),
data: DataSection::new(arena),
linking: LinkingSection::new(arena),
reloc_code: RelocationSection::new(arena, "reloc.CODE"),
reloc_data: RelocationSection::new(arena, "reloc.DATA"),
}
}
/// Create entries in the Type and Function sections for a function signature
pub fn add_function_signature(&mut self, signature: Signature<'a>) {
let index = self.types.insert(signature);